Things that go right

Resilience Engineering sees the "things that go wrong" as the flip side of the "things that go right" and therefore assumes that they are a result of the same underlying processes. In consequence of that, "things that go right" and "things that go wrong" should be explained in basically the same way.

It therefore makes as much sense to try to understand why things to right as to understand why they go wrong. In fact, it makes more sense because there are many more things that go right than things that go wrong, the ratio depending on how (im)probable an accident is considered to be.

Task descriptions and dynamic behaviour of systems

While a system traditionally is modeled by structural decomposition into structural elements, the dynamic behaviour of systems and their actors is modelled by decomposition of the behavioral flow into events, acts, decisions, and errors. Such decomposition is the basis for identification of activity elements in terms of 'tasks' and task elements in terms of 'acts.' The problem is, that all work situations leave many degrees of freedom for choice by the actors, even when the objectives of work are fulfilled.